Dutch exotic dancer and supposed spy, Mata Hari, debuted her act at the Musée Guimet on 13th March 1905. She would be executed as a German spy in France on 15th October 1917.

The keel of HMS Dreadnought was laid down on 2nd October 1905. A revolutionary battleship design that would render all "pre-Dreadnoughts" obsolete and restart a naval building race.

In 1905 Albert Einstein published papers on the Special Theory of Relativity, the Photoelectric effect, Brownian motion, and Mass energy equivalence, which lead to a revolution in how space, time, mass, and energy were viewed in modern physics.